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Advanced encoding options (codec, quality, resolution, audio, fps, split)

Audio bitrate (for audio output):

Video codec:

Quality: 3 (1 best, 5 smallest)

Resolution / aspect:

Frame rate (fps):

Audio codec:

Fade transition:

Performance:

Split into segments (seconds, 0 = off):

Drop your input, pick the target format, and download the converted file.

How the conversion runs. The encoding happens in your browser through FFmpeg.wasm. The file never leaves your device; nothing is uploaded to a server. Pick the output format from the dropdown above the file picker, drop the source, and the page returns a downloadable result when the encode finishes.

Container repack vs re-encode. Switching between MP4, WebM, MOV, AVI, and MKV repackages the existing streams without re-encoding, so the original video bitrate, frame rate, and resolution are preserved exactly. Switching to an audio format (MP3, AAC, OGG, FLAC, M4A, WAV) extracts the audio track and re-encodes it. Pick the MP3 bitrate from the selector above: 128 kbps for a small file, 192 kbps default, 256 or 320 kbps for higher quality. FLAC and WAV are lossless and ignore the bitrate setting.

In-Browser HD Video Converter

Last reviewed: 2026-05-22

Convert HD video to MP4, WebM, MOV, AVI, or MKV - or pull the audio track to MP3, AAC, OGG, FLAC, M4A, or WAV - right in your browser. Files stay on your device: the converter runs locally via FFmpeg.wasm, with no upload, no install, and no account.

Convert a clip or pull its audio locally - the file never leaves your browser tab.

Key features

Convert in the browser. Pick the output format from the dropdown above the file picker, drop the source, and download the result.
Extract just the audio. Pull the track out as MP3, AAC, OGG, FLAC, M4A, or WAV without sending the source to a server.
Choose the MP3 bitrate. 128 kbps for a small file, 192 kbps standard (the default), 256 kbps high, or 320 kbps maximum; FLAC and WAV stay lossless and ignore the setting.
Make a GIF preview. A clip becomes a GIF downsampled to 10 frames per second and 480 px wide, small enough to share.

When to use it

Use this when you would rather not upload a clip to a server, when the network is slow, or when the source contains anything you want to keep local. For the original server-side FFmpeg tool on this site, see video-converter.html.

Compress video online free

Move an HD clip between MP4, WebM, MOV, AVI, and MKV containers right in the browser without re-encoding - the source bitrate, frame rate, and resolution are preserved exactly while the container swap repackages the streams into the requested wrapper. Picking a more efficient container that the recipient supports often shaves the file size on disk because modern containers like WebM and MP4 carry less per-frame metadata overhead than older wrappers; the repack runs locally on the device, so the source file never leaves the laptop or phone.

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Last updated: Jun 19, 2026

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Tags: #video, #converter

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Frequently Asked Questions

What does the HD Video Converter do?

Convert HD video files between common formats in your browser.

When should I use the HD Video Converter?

When you would rather not upload a clip to a server - the conversion runs locally on your device, so it suits private footage, a slow network, or working offline.

What complementary tool works alongside it?

See the original video converter for the server-based version on this site.

Where do my files end up?

Inputs are processed locally and discarded when the page closes.

How do I pick the output format?

Format options are listed in the dropdown above the file picker.